David Singer:
> Unless [e notation] introduces problems stronger than 'don't like' / 'don't need' (e.g. the presence of the 'e' seriously complicates other parts of the grammar), we should introduce it and move on.
As shown before I believe it only doesnâ€™t introduce grammar problems when not followed by a unit identifier. So, perhaps, allow â€˜1e0â€™ but donâ€™t spec â€˜1e0emâ€™.